Assuming newer versions are derived from code that was licensed GPL in the old version, the newer versions (which include new code) are also licensed GPL, whether the person writing the new code likes it or not.
No, this is plainly wrong. A license is a proclamation of the copyrightowner how others can use their material. The copywrite owner does not license their own work to themself, they can do whatever they want with their copyright. If you are not the copyright owner you have to have the license and afe only permitted to use the material after that license.
Assuming newer versions are derived from code that was licensed GPL in the old version, the newer versions (which include new code) are also licensed GPL, whether the person writing the new code likes it or not.
No, this is plainly wrong. A license is a proclamation of the copyrightowner how others can use their material. The copywrite owner does not license their own work to themself, they can do whatever they want with their copyright. If you are not the copyright owner you have to have the license and afe only permitted to use the material after that license.